Fast forward to present day, where suddenly concerts featuring a "holograph" are selling out in Japan. I remember System of a Down frontman Serj Tankian talking about what holographic touring could do for bands that wanted to reduce their carbon footprint. He was just waiting for the technology to catch up. If what we're seeing in Japan is any indication, that future may arrive sooner than later. From HuffPo:

Holographic idol Hatsune Miku is the creation of the group Crypton Future Media, using software from Vocaloid, and the group has put the avatar on tour with a live band. The sight of thousands of screaming fans waving glow sticks while the holograph "performs" on stage is straight out of a science-fiction novel.

While it's by no means a living person, it's still a shockingly realistic performance — and gives a clear indication that holographic concerts are no longer SciFi only. There may come a day when Lady Gaga is not only performing in Chicago, but also London, Paris and L.A. at the same time. Check out the video below.